Integrated type miniaturized round proximity switch

Abstract

The invention provides an integrated type miniaturized round proximity switch. The integrated type miniaturized round proximity switch comprises a metal outer shell (1), a minitype inductive transducer, a switching circuit board, a socket (7), a micro inductive type approach transducer and switching circuit components, wherein the maximum outer diameter of the metal outer shell (1) is smaller than 23mm, the minitype inductive transducer is arranged in the metal outer shell (1) and is provided with a coil assembly (3), and the socket (7) is fixedly connected at the tail end of the metal outer shell. The micro inductive type approach transducer is formed by an inductive coil assembly (2) and an iron core, the opening end of the iron core is tightly attached to the inner bottom (9) of the metal outer shell of an inductive head, the inductive coil assembly is electrically connected with a switching circuit through two coil lead wires (4), the switching circuit components are composed of a receiving circuit board (5) and a voltage-stabilized source board (6), the switching circuit components are regarded at a unified independent body and are pasted and solidified in a rear cavity (10) of the metal outer shell through insulation glue. According to the integrated type miniaturized round proximity switch, the independent inductive transducer, an independent electronic component and an independent power source component are regarded as the unified independent body, the size is smaller than that of an independent miniaturized proximity switch in the prior art, and the size and the weight of a control box are reduced for a carrier.

Description

technical field [0001] The invention relates to a miniaturized circular proximity switch mainly used for measuring the proximity distance between a moving object and a target ≤ 2.15mm and outputting a discrete signal. Background technique [0002] The so-called proximity switch means that the measured target does not need to touch the switch body, but only needs to approach within the specified distance, and the switch will send out the specified signal; on the contrary, when the measured target leaves the specified distance, the switch will send out another specified signal. kind of signal. A proximity switch is a product that senses the proximity of an object and outputs a discrete signal. It uses the sensitivity of the built-in proximity sensor to the approaching ferromagnetic object to measure the inductance value of the measured object near a specific point, and transmits this characteristic to the receiving chip. The condition of the dot position is indicated by the ...

AI Technical Summary

Problems solved by technology

Due to the size of the signal conversion box and its resistance to environmental conditions, it is far away from the sensor. Therefore, the signal transmission cable is considered to be (15~20) m. Since the inductive signal is easily interfered, although shielding is adopted, it has a significant impact on the measurement accuracy.

At the same time, it can be found that if the carrier body does not require more measuring points, the structure in which the sensor is separated from the conversion circuit is not ideal.

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